:root {
  /* Raw light & dark color tokens */
  --bg-light: #f4f1eb;
  --bg-dark: #0f1419;
  --bg-top-light: #fffcf6;
  --bg-top-dark: #151d24;
  --card-light: #fffdf8;
  --card-dark: #18212a;
  --card-hover-light: #fffaf0;
  --card-hover-dark: #1e2934;
  --media-bg-light: #f7f1e7;
  --media-bg-dark: #131a22;
  --ink-light: #211f1b;
  --ink-dark: #f1f5f9;
  --muted-light: #6e675f;
  --muted-dark: #94a3b8;
  --line-light: #e4dccf;
  --line-dark: #283542;
  --line-strong-light: #d0c6b7;
  --line-strong-dark: #38485a;
  --accent-light: #165f7a;
  --accent-dark: #38bdf8;
  --accent-hover-light: #104d64;
  --accent-hover-dark: #0ea5e9;
  --accent-soft-light: #e8f3f6;
  --accent-soft-dark: rgba(56, 189, 248, 0.14);
  --telegram: #248fc3;
  --success-light: #2d6a4f;
  --success-dark: #4ade80;
  --success-soft-light: #edf7ef;
  --success-soft-dark: rgba(74, 222, 128, 0.12);
  --warning-light: #8a5a00;
  --warning-dark: #fbbf24;
  --warning-soft-light: #fff5d8;
  --warning-soft-dark: rgba(251, 191, 36, 0.14);
  --danger-light: #b91c1c;
  --danger-dark: #f87171;
  --danger-soft-light: #fef2f2;
  --danger-soft-dark: rgba(248, 113, 113, 0.14);

  /* Default fallback (light) */
  --bg: var(--bg-light);
  --bg-top: var(--bg-top-light);
  --card: var(--card-light);
  --card-hover: var(--card-hover-light);
  --media-bg: var(--media-bg-light);
  --ink: var(--ink-light);
  --muted: var(--muted-light);
  --line: var(--line-light);
  --line-strong: var(--line-strong-light);
  --accent: var(--accent-light);
  --accent-hover: var(--accent-hover-light);
  --accent-soft: var(--accent-soft-light);
  --success: var(--success-light);
  --success-soft: var(--success-soft-light);
  --warning: var(--warning-light);
  --warning-soft: var(--warning-soft-light);
  --danger: var(--danger-light);
  --danger-soft: var(--danger-soft-light);
  --scrollbar-thumb: #b8afa2;
  --scrollbar-track: #f4f1eb;

  /* Fallback for browsers without light-dark() support */
  @media (prefers-color-scheme: dark) {
    --bg: var(--bg-dark);
    --bg-top: var(--bg-top-dark);
    --card: var(--card-dark);
    --card-hover: var(--card-hover-dark);
    --media-bg: var(--media-bg-dark);
    --ink: var(--ink-dark);
    --muted: var(--muted-dark);
    --line: var(--line-dark);
    --line-strong: var(--line-strong-dark);
    --accent: var(--accent-dark);
    --accent-hover: var(--accent-hover-dark);
    --accent-soft: var(--accent-soft-dark);
    --success: var(--success-dark);
    --success-soft: var(--success-soft-dark);
    --warning: var(--warning-dark);
    --warning-soft: var(--warning-soft-dark);
    --danger: var(--danger-dark);
    --danger-soft: var(--danger-soft-dark);
    --scrollbar-thumb: #3b4b5c;
    --scrollbar-track: #0f1419;
  }

  /* Modern light-dark() tokens */
  @supports (color: light-dark(white, black)) {
    --bg: light-dark(var(--bg-light), var(--bg-dark));
    --bg-top: light-dark(var(--bg-top-light), var(--bg-top-dark));
    --card: light-dark(var(--card-light), var(--card-dark));
    --card-hover: light-dark(var(--card-hover-light), var(--card-hover-dark));
    --media-bg: light-dark(var(--media-bg-light), var(--media-bg-dark));
    --ink: light-dark(var(--ink-light), var(--ink-dark));
    --muted: light-dark(var(--muted-light), var(--muted-dark));
    --line: light-dark(var(--line-light), var(--line-dark));
    --line-strong: light-dark(var(--line-strong-light), var(--line-strong-dark));
    --accent: light-dark(var(--accent-light), var(--accent-dark));
    --accent-hover: light-dark(var(--accent-hover-light), var(--accent-hover-dark));
    --accent-soft: light-dark(var(--accent-soft-light), var(--accent-soft-dark));
    --success: light-dark(var(--success-light), var(--success-dark));
    --success-soft: light-dark(var(--success-soft-light), var(--success-soft-dark));
    --warning: light-dark(var(--warning-light), var(--warning-dark));
    --warning-soft: light-dark(var(--warning-soft-light), var(--warning-soft-dark));
    --danger: light-dark(var(--danger-light), var(--danger-dark));
    --danger-soft: light-dark(var(--danger-soft-light), var(--danger-soft-dark));
    --scrollbar-thumb: light-dark(#b8afa2, #3b4b5c);
    --scrollbar-track: light-dark(#f4f1eb, #0f1419);
  }

  --radius: 22px;
  --container: 780px;

  /* MANDATORY: Apply color-scheme to :root for viewport-wide theming */
  color-scheme: light dark;
  accent-color: var(--accent);
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);

  &:has(> head > meta[name="color-scheme"][content="dark"]) {
    color-scheme: dark;
  }
  &:has(> head > meta[name="color-scheme"][content="light"]) {
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(22, 95, 122, .12), transparent 32rem),
    linear-gradient(180deg, var(--bg-top) 0, var(--bg) 28rem);
  background-color: var(--bg);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  min-height: 100vh;
}

a { color: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page {
  width: min(100% - clamp(24px, 5vw, 64px), var(--container));
  margin-inline: auto;
  padding-block: 20px 72px;
}

@media (min-width: 820px) {
  body {
    padding-block: 22px 44px;
    background:
      radial-gradient(circle at 50% 0%, rgba(22, 95, 122, 0.20), transparent 46rem),
      light-dark(#e3ddd2, #070a0e);
  }
  .page {
    width: min(100% - 48px, 780px);
    margin-inline: auto;
    padding: 26px 30px 42px;
    background:
      radial-gradient(circle at top left, rgba(22, 95, 122, .10), transparent 28rem),
      linear-gradient(180deg, var(--bg-top) 0, var(--bg) 28rem);
    border: 1px solid var(--line-strong);
    border-radius: 28px;
    box-shadow: 0 24px 72px rgba(0, 0, 0, 0.38);
  }
}

/* Topbar Navigation */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .04);
  flex-wrap: wrap;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--ink);
}

.brand-badge {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 18px;
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.search-trigger:hover {
  border-color: var(--line-strong);
  color: var(--ink);
}

.search-kbd {
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  font-size: 11px;
  font-weight: 700;
}

.icon-btn,
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}

.icon-btn:hover,
.lang-switch:hover {
  border-color: var(--line-strong);
  background: var(--card-hover);
}

.ai-top-btn {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

/* Theme toggle icon branching */
.theme-icon-dark { display: none; }
.theme-icon-light { display: inline; }

@media (prefers-color-scheme: dark) {
  :root:not(:has(> head > meta[name="color-scheme"][content="light"])) .theme-icon-light { display: none; }
  :root:not(:has(> head > meta[name="color-scheme"][content="light"])) .theme-icon-dark { display: inline; }
}
:root:has(> head > meta[name="color-scheme"][content="dark"]) .theme-icon-light { display: none; }
:root:has(> head > meta[name="color-scheme"][content="dark"]) .theme-icon-dark { display: inline; }

/* Node Status Maintenance Banner */
.node-alert-banner {
  display: none;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  padding: 14px 18px;
  border: 1px solid var(--warning);
  border-radius: 16px;
  background: var(--warning-soft);
  color: var(--warning);
  font-size: 14px;
  font-weight: 600;
}

/* Telegram WebApp Personal Subscription Widget */
.sub-panel {
  display: none;
  margin-bottom: 24px;
  padding: 20px;
  border: 1px solid var(--accent);
  border-radius: 22px;
  background: var(--card);
  box-shadow: 0 14px 36px rgba(22, 95, 122, .10);
}

.sub-panel.is-visible {
  display: block;
}

.sub-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.sub-user-greeting {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 760;
}

.sub-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 780;
  text-transform: uppercase;
}

.sub-status-pill.active {
  background: var(--success-soft);
  color: var(--success);
}

.sub-status-pill.expired,
.sub-status-pill.disabled {
  background: var(--danger-soft);
  color: var(--danger);
}

.sub-status-pill.limited {
  background: var(--warning-soft);
  color: var(--warning);
}

.sub-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 14px;
}

.sub-tab {
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.sub-tab.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.sub-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.sub-metric-card {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg);
}

.sub-metric-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.sub-metric-value {
  font-size: 15px;
  font-weight: 760;
  color: var(--ink);
}

.sub-key-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  background: var(--bg);
}

.sub-key-masked {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  color: var(--muted);
  word-break: break-all;
}

.sub-devices-box {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.sub-devices-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.sub-devices-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 8px;
}

.sub-device-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  font-size: 13px;
}

.sub-device-meta {
  display: grid;
  gap: 2px;
}

.sub-device-meta strong { font-size: 13px; }
.sub-device-meta span { font-size: 11px; color: var(--muted); }

.sub-device-del {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--danger);
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.sub-device-del:hover {
  background: var(--danger-soft);
  border-color: var(--danger);
}

/* Hero & Typography (ShukaVPN Reference Style) */
.hero {
  display: grid;
  justify-items: start;
  row-gap: 12px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0 clamp(24px, 4vw, 36px);
}

.eyebrow,
.step-kicker {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 12px;
  color: var(--accent);
  background: transparent;
  font-size: 13px;
  font-weight: 760;
  line-height: 1.2;
  letter-spacing: .01em;
}

.step-kicker::after { content: counter(step); }
.eyebrow { margin: 0; }
.step-kicker { margin: 0 0 14px; }

h1 {
  max-width: 780px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4.8vw, 46px);
  font-weight: 780;
  line-height: 1.08;
  letter-spacing: -.042em;
  text-wrap: balance;
}

h2 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 760;
  line-height: 1.15;
  letter-spacing: -.03em;
  text-wrap: balance;
}

.lead {
  max-width: 700px;
  margin: 2px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.55;
}

.device-hint {
  width: fit-content;
  max-width: 700px;
  margin: 4px 0 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 9px 14px;
  color: var(--muted);
  background: var(--card);
  font-size: 14px;
  line-height: 1.4;
}

/* Section Headers on Hub */
.section-heading {
  margin: 34px 0 14px;
  font-size: clamp(20px, 2.5vw, 25px);
  font-weight: 780;
  letter-spacing: -0.025em;
  color: var(--ink);
}

/* Grid & Device Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.card {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 20px;
  background: var(--card);
  box-shadow: 0 12px 34px rgba(0, 0, 0, .04);
  text-decoration: none;
  transition: background .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.card:hover {
  border-color: var(--line-strong);
  background: var(--card-hover);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .08);
  text-decoration: none;
  transform: translateY(-1px);
}

.device-card {
  position: relative;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 14px;
  min-height: 112px;
  padding: 18px;
}

.card-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--bg);
  font-size: 22px;
  line-height: 1;
  color: var(--accent);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-copy {
  display: grid;
  gap: 5px;
}

.card-copy strong,
.card strong {
  color: var(--ink);
  font-size: 18px;
  line-height: 1.24;
}

.card-copy span,
.card span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.recommendation {
  display: none;
  width: fit-content;
  margin-top: 6px;
  border-radius: 8px;
  padding: 4px 9px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 12px;
  font-style: normal;
  font-weight: 780;
  line-height: 1.1;
}

.device-card.is-recommended {
  border-color: var(--accent);
  box-shadow: 0 18px 46px rgba(22, 95, 122, .15);
}

.device-card.is-recommended .card-icon {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.device-card.is-recommended .recommendation {
  display: inline-flex;
}

/* App Selector Tabs on Platform Guides */
.app-tabs-wrap {
  margin: 0 0 22px;
}

.app-tabs-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 10px;
}

.app-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.app-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
  transition: all .16s ease;
}

.app-tab:hover {
  border-color: var(--line-strong);
  background: var(--card-hover);
}

.app-tab.is-active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 20px rgba(22, 95, 122, .20);
}

.app-tab-star {
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(255, 255, 255, .18);
}

.app-tab:not(.is-active) .app-tab-star {
  background: var(--accent-soft);
  color: var(--accent);
}

.app-pane {
  display: none;
}

.app-pane.is-active {
  display: block;
}

/* Step-by-Step Cards */
.steps {
  display: grid;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 260px);
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 12px 34px rgba(0, 0, 0, .04);
  counter-increment: step;
}

.step:has(.media-stack) {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
}

.step.copy-only { grid-template-columns: 1fr; }

.step-copy {
  display: grid;
  align-content: start;
  padding: clamp(24px, 4vw, 38px);
}

.step p,
.help p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.62;
}

.step p + p {
  margin-top: 10px;
}

.actions,
.step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.button,
.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: 100%;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 11px 16px;
  font: inherit;
  font-size: 15px;
  font-weight: 760;
  line-height: 1.15;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.back-link {
  width: fit-content;
  margin: 0 0 8px;
  border-color: var(--line);
  color: var(--ink);
  background: var(--card);
  font-size: 14px;
}

.button:hover,
.back-link:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--accent-light);
  box-shadow: 0 10px 22px rgba(22, 95, 122, .18);
}

.button.primary:hover { background: var(--accent-hover-light); }

.button.secondary,
.back-link {
  color: var(--ink);
  border-color: var(--line);
  background: var(--bg);
}

.button.secondary:hover,
.back-link:hover {
  border-color: var(--line-strong);
  background: var(--card-hover);
}

.button.telegram {
  color: #fff;
  background: var(--telegram);
  box-shadow: 0 10px 22px rgba(36, 143, 195, .16);
}

.button.telegram:hover { background: #1c7ca9; }

.button.share {
  color: var(--accent);
  border-color: var(--line-strong);
  background: var(--accent-soft);
}

.button.warning {
  border-color: #f0b429;
  color: #3f2a00;
  background: linear-gradient(180deg, #ffe08a, #ffc93d);
}

/* Media & Screenshots */
.media {
  display: grid;
  min-height: 100%;
  place-items: center;
  margin: 0;
  padding: 24px;
  background: var(--media-bg);
}

.media img {
  display: block;
  width: auto;
  max-width: min(100%, var(--image-max, 300px));
  height: auto;
  border-radius: var(--image-radius, 20px);
  background: #fff;
  box-shadow: 0 16px 34px rgba(0, 0, 0, .14);
}

.media.logo img {
  --image-max: 160px;
  --image-radius: 24px;
  box-shadow: none;
  background: transparent;
}

.media.wide img { --image-max: 340px; }
.media.small img { --image-max: 280px; }
.media.phone img { --image-max: 215px; }
.media.desktop img { --image-max: 380px; }

.media-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: center;
  justify-items: center;
  min-height: 100%;
  margin: 0;
  padding: 20px;
  background: var(--media-bg);
}

.media-stack .media {
  min-height: auto;
  padding: 0;
  background: transparent;
}

.media-stack .media img { --image-max: 190px; }

/* Callouts */
.callout {
  margin-top: 18px;
  border: 1px solid var(--success);
  border-radius: 16px;
  padding: 15px 16px;
  color: var(--ink);
  background: var(--success-soft);
  font-size: 15px;
  line-height: 1.55;
}

.callout strong {
  display: block;
  margin-bottom: 4px;
  color: var(--success);
}

.callout.warning {
  border-color: var(--warning);
  background: var(--warning-soft);
}

.callout.warning strong { color: var(--warning); }

.callout.danger {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.callout.danger strong { color: var(--danger); }

.help {
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: clamp(24px, 4vw, 38px);
  background: var(--card);
}

.backup {
  margin-top: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: 22px;
  padding: clamp(20px, 3.5vw, 30px);
  background: var(--card);
}

.step-copy pre {
  margin: 14px 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  color: #f4f7f8;
  background: #142530;
  font-size: 13px;
  line-height: 1.55;
}

.step-copy code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.step-copy p code {
  border-radius: 6px;
  padding: 2px 6px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 0.92em;
}

/* Search Modal & AI Assistant Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  place-items: start center;
  padding: clamp(16px, 6vh, 64px) 16px 24px;
  background: rgba(10, 15, 22, 0.62);
  backdrop-filter: blur(6px);
}

.modal-backdrop.is-open {
  display: grid;
}

.modal-card {
  width: min(100%, 680px);
  max-height: 84vh;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background: var(--card);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .28);
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.search-input {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  outline: none;
}

.filter-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.filter-chip {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.filter-chip.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  display: grid;
  gap: 10px;
}

.search-result-item {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg);
  text-decoration: none;
  transition: border-color .15s ease;
}

.search-result-item:hover {
  border-color: var(--accent);
}

.search-result-item strong {
  font-size: 15px;
  color: var(--ink);
}

.search-result-item span {
  font-size: 13px;
  color: var(--muted);
}

/* Floating AI Button & Chat */
.ai-fab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent-light);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 780;
  box-shadow: 0 14px 32px rgba(22, 95, 122, .32);
  cursor: pointer;
  transition: transform .18s ease;
}

.ai-fab:hover { transform: translateY(-2px); }

.ai-messages {
  display: grid;
  gap: 12px;
  max-height: 52vh;
  overflow-y: auto;
  padding: 16px 20px;
}

.ai-msg {
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.55;
}

.ai-msg.bot {
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--ink);
}

.ai-msg.user {
  background: var(--accent-light);
  color: #fff;
  justify-self: end;
  max-width: 85%;
}

.ai-msg a {
  color: var(--accent);
  font-weight: 700;
}

.ai-form {
  display: flex;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.ai-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}

/* Diagnostics Table */
.diag-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 14px;
}

.diag-table th,
.diag-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.site-footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: minmax(0, 1fr) minmax(180px, 220px); }
  .step:has(.media-stack) { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .page {
    width: min(100% - 24px, var(--container));
    padding-block: 14px 56px;
  }
  .back-link,
  .button { width: 100%; }
  .step,
  .step:has(.media-stack) { grid-template-columns: 1fr; }
  .step-copy { padding: 22px 20px; }
  .media { padding: 16px 20px 20px; }
  .search-kbd { display: none; }
}